Electrocraft Volume 4

Electrocraft Volume 4

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ... case the business was started in a space about twenty feet square, behind the kitchen of a residence. The front of the boiler was placed five feet away from the kitchen wall and a door opened into the kitchen every time the boiler tubes were scraped. No jointed rods were known at that time. Beside the boiler was a ten by twelve highspeed engine with the centres of the five-foot wheels only four and one-half feet from the kitchen wall. Belted back from one wheel was a thirtylight are dynamo between the cylinder-head and the wall; belted back from the other wheel was a two hundred-light incandescent machine. On the side opposite the boiler wall was the switchboard. A walk two feet wide around the engine and dynamos left room for a little bench and the oil tanks. The one man running the plant had the five-foot space before the boiler and if anything went wrong he had to go carefully between the boiler wall and a belt, and then between the two dynamos to reach the throttle valve. In towns where the business was small enough at the start to be all cared for by one engine, the high speed centre crank type was very popular, and when enlargement became necessary it was usually done by adding another engine and one or two dynamos. In some other plants where a former mill or factory with a large engine and line shaft were to be utilized, the speed of the engine was reduced to suit the load, and the driving pulley on the shaft made of such diameter as to give proper speed to all dynamos operated from that shaft. The addi tion of more dynamos then required simply another pulley at the line shaft and no change at the engine till the limit of its capacity at the reduced speed was reached, then a larger driven pulley was put on the shaft and the engine...show more

Product details

  • Paperback | 328 pages
  • 189 x 246 x 18mm | 585g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236845471
  • 9781236845474